Photocharacterization and pH Sensing Properties of a Novel Synthesized Fluorescent Schiff Base Derivative

Merve Zurnacı

Makale detayları

Photocharacterization and pH Sensing Properties of a Novel Synthesized Fluorescent Schiff Base Derivative

Yazarlar:

Merve Zurnacı

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Bilimi ve Teknolojileri

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.15 Issue 3, pp.1119-1132

Belge Tipi:

Makale

Yayın Tarihi:

9/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001358297

pISSN:

2564-7377

Anahtar kelimeler:

Özet:

 Design and synthesis of different, highly sensitive and fast response fluorescent materials are very important in the development of pH sensors. In this study, a new pH-sensitive Schiff-base ligand PHS1 was synthesized by the condensation reaction of newly synthesized 1,3,4-thiadiazole derivative containing phenanthroimidazole PHT1 with 3,5-ditertbutylsalicylaldehyde 1:1 in ethanol. The molecular structure was confirmed by structural characterization methods. The absorption and fluorescence properties of PHS1 were investigated in DMSO to determine the photocharacterization properties. Then, PHS1 was investigated as a fluorescent pH sensor. UV absorption and emission studies of PHS1 with varying pH at pH2.0, 4.0, 6.0, 8.0, 10.0 and 12.0 were determined in Britton-Robinson buffer. The absorption wavelength recorded at 345 nm at pH 2.0 showed bathochromic effect as pH increased at pH 4.0; 6.0 and 8.0. At pH 10.0 and 12.0, PHS1 showed two absorption peaks at 357 nm and a new low energy absorption band at 405 nm. The fluorescence spectrum of PHS1 showed a red shift with an increasing wavelength from 439 nm to 473 nm between pH2.0 and 12.0. These results showed that PHS1 is sensitive to pH change in acidic and basic environments.

 Design and synthesis of different, highly sensitive and fast response fluorescent materials are very important in the development of pH sensors. In this study, a new pH-sensitive Schiff-base ligand PHS1 was synthesized by the condensation reaction of newly synthesized 1,3,4-thiadiazole derivative containing phenanthroimidazole PHT1 with 3,5-ditertbutylsalicylaldehyde 1:1 in ethanol. The molecular structure was confirmed by structural characterization methods. The absorption and fluorescence properties of PHS1 were investigated in DMSO to determine the photocharacterization properties. Then, PHS1 was investigated as a fluorescent pH sensor. UV absorption and emission studies of PHS1 with varying pH at pH2.0, 4.0, 6.0, 8.0, 10.0 and 12.0 were determined in Britton-Robinson buffer. The absorption wavelength recorded at 345 nm at pH 2.0 showed bathochromic effect as pH increased at pH 4.0; 6.0 and 8.0. At pH 10.0 and 12.0, PHS1 showed two absorption peaks at 357 nm and a new low energy absorption band at 405 nm. The fluorescence spectrum of PHS1 showed a red shift with an increasing wavelength from 439 nm to 473 nm between pH2.0 and 12.0. These results showed that PHS1 is sensitive to pH change in acidic and basic environments.

 Design and synthesis of different, highly sensitive and fast response fluorescent materials are very important in the development of pH sensors. In this study, a new pH-sensitive Schiff-base ligand PHS1 was synthesized by the condensation reaction of newly synthesized 1,3,4-thiadiazole derivative containing phenanthroimidazole PHT1 with 3,5-ditertbutylsalicylaldehyde 1:1 in ethanol. The molecular structure was confirmed by structural characterization methods. The absorption and fluorescence properties of PHS1 were investigated in DMSO to determine the photocharacterization properties. Then, PHS1 was investigated as a fluorescent pH sensor. UV absorption and emission studies of PHS1 with varying pH at pH2.0, 4.0, 6.0, 8.0, 10.0 and 12.0 were determined in Britton-Robinson buffer. The absorption wavelength recorded at 345 nm at pH 2.0 showed bathochromic effect as pH increased at pH 4.0; 6.0 and 8.0. At pH 10.0 and 12.0, PHS1 showed two absorption peaks at 357 nm and a new low energy absorption band at 405 nm. The fluorescence spectrum of PHS1 showed a red shift with an increasing wavelength from 439 nm to 473 nm between pH2.0 and 12.0. These results showed that PHS1 is sensitive to pH change in acidic and basic environments.

 pH sensörlerinin geliştirilmesinde, farklı, yüksek hassasiyet ve hızlı tepki floresan malzemelerin tasarımı ve sentezi çok önemlidir. Bu çalışmada, yeni sentezlenen fenantroimidazol içeren 1,3,4-tiyadiazol türevinin PHT1 etanolde 3,5-ditertbütilsalisilaldehit 1:1 ile kondenzasyon reaksiyonu ile yeni bir pH-duyarlı Schiff bazı ligandı PHS1 sentezlendi. Moleküler yapı, yapısal karakterizasyon yöntemleri ile doğrulandı. PHS1in absorpsiyon ve floresan özellikleri, fotokarakterizasyon özelliklerini belirlemek için DMSOda incelendi. Daha sonra, PHS1 floresan pH sensörü olarak araştırıldı. PHS1in değişen pHta pH2,0, 4,0, 6,0, 8,0, 10,0 ve 12,0da UV absorpsiyon ve emisyon çalışmaları Britton-Robinson tamponunda belirlendi. pH 2,0de 345 nmde kaydedilen emilim dalga boyu, pH arttıkça batokromik etki gösterdi pH 4,0da; 6,0 ve 8,0. pH 10,0 ve 12,0de, PHS1 357 nmde iki emilim tepe noktası ve 405 nmde yeni bir düşük enerjili emilim bandı gösterdi. PHS1in floresan spektrumu pH2,0-12,0 arasında 439 nmden 473 nmye artan bir dalga boyu ile kırmızıya kayma gösterdi. Bu sonuçlar PHS1in asidik ve bazik ortamlardaki pH değişimine duyarlı olduğunu gösterdi.

Makale detayları

Photocharacterization and pH Sensing Properties of a Novel Synthesized Fluorescent Schiff Base Derivative

Yazarlar:

Merve Zurnacı

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Bilimi ve Teknolojileri

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.15 Issue 3, pp.1119-1132

Belge Tipi:

Makale

Yayın Tarihi:

9/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001358297

pISSN:

2564-7377

Schiff Base Derivative

pH Sensor

Photocharacterization

UV-Vis absorption

FluorescenceSchiff Bazı Türevi

pH Sensörü

Fotokarakterizasyon

UV-Vis absorpsiyonu

Floresans

Sayı

Makale detayları

Yazarlar: Merve Zurnacı

Yayıncı: Giresun University

Ana Başlıklar: Malzeme Bilimi ve Teknolojileri

Dergi: Karadeniz Fen Bilimleri Dergisi Vol.15 Issue 3, pp.1119-1132

Belge Tipi: Makale

Yayın Tarihi: 9/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001358297

pISSN: 2564-7377

Sayı

Yazarlar:

Merve Zurnacı

Yayıncı:

Giresun University

Ana Başlıklar:

Malzeme Bilimi ve Teknolojileri

Dergi:

Karadeniz Fen Bilimleri Dergisi Vol.15 Issue 3, pp.1119-1132

Belge Tipi:

Makale

Yayın Tarihi:

9/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001358297

pISSN:

2564-7377